Instructed as technology expert witness in a high-profile UK High Court case regarding functionality of a large, bespoke electronic funds transfer at point of sale (EFTPOS) payment and accounting system. Analysed contemporaneous and legacy documentation to opine on the suitability of the development process adopted in construction of the system. Key issues included the robustness of the software and its functionality, adequacy of the support services alongside review of historic bugs and issues, and testing practices.